The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 21, 2005
Filed:
May. 27, 2003
Robert Aigner, München, DE;
Stephan Marksteiner, Putzbrunn, DE;
Winfried Nessler, München, DE;
Lüder Elbrecht, München, DE;
Robert Aigner, München, DE;
Stephan Marksteiner, Putzbrunn, DE;
Winfried Nessler, München, DE;
Lüder Elbrecht, München, DE;
Infineon Technologies AG, Munich, DE;
Abstract
The invention relates to bulk acoustic wave filters including at least two bulk acoustic wave resonators. Each of these resonators includes at least one first electrode, a piezoelectric layer, and a second electrode. At least two of the bulk acoustic wave resonators have effective resonator surfaces which differ in their surface form and/or surface content. The inventive design of the bulk acoustic wave resonators enables optimal suppression of interference modes without influencing the impedance level of the filter.